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33574c17 | 1 | /* Test mutexes. |
04277e02 | 2 | Copyright (C) 2000-2019 Free Software Foundation, Inc. |
33574c17 ST |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
ad2b41bf ST |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
33574c17 ST |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
ad2b41bf | 13 | Lesser General Public License for more details. |
33574c17 | 14 | |
ad2b41bf ST |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see | |
17 | <http://www.gnu.org/licenses/>. */ | |
33574c17 ST |
18 | |
19 | #define _GNU_SOURCE | |
20 | ||
21 | #include <pthread.h> | |
22 | #include <assert.h> | |
23 | #include <unistd.h> | |
24 | #include <error.h> | |
25 | #include <errno.h> | |
26 | #include <stdio.h> | |
27 | ||
28 | #define THREADS 500 | |
29 | ||
30 | void * | |
31 | foo (void *arg) | |
32 | { | |
33 | pthread_mutex_t *mutex = arg; | |
34 | pthread_mutex_lock (mutex); | |
35 | pthread_mutex_unlock (mutex); | |
36 | return mutex; | |
37 | } | |
38 | ||
39 | int | |
40 | main (int argc, char **argv) | |
41 | { | |
42 | int i; | |
43 | error_t err; | |
44 | pthread_t tid[THREADS]; | |
45 | pthread_mutex_t mutex[THREADS]; | |
46 | ||
47 | for (i = 0; i < THREADS; i++) | |
48 | { | |
49 | pthread_mutex_init (&mutex[i], 0); | |
50 | pthread_mutex_lock (&mutex[i]); | |
51 | err = pthread_create (&tid[i], 0, foo, &mutex[i]); | |
52 | if (err) | |
53 | error (1, err, "pthread_create"); | |
54 | sched_yield (); | |
55 | } | |
56 | ||
57 | for (i = THREADS - 1; i >= 0; i--) | |
58 | { | |
59 | void *ret; | |
60 | pthread_mutex_unlock (&mutex[i]); | |
61 | err = pthread_join (tid[i], &ret); | |
62 | if (err) | |
63 | error (1, err, "pthread_join"); | |
64 | assert (ret == &mutex[i]); | |
65 | } | |
66 | ||
67 | return 0; | |
68 | } |